* {
    margin: 0;
    padding: 0;
    user-select: none;
    box-sizing: border-box;
}
body {
    background-color: #333;
    overflow: hidden;
}
.main-continaer {
    width: 1028px;
    height: 728px;
    background-color: #fff;
    padding: 10px;
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    margin: 10px auto;
}
.ms-right {
    width: 190px;
    height: 708px;
    /* background-color: #ccc; */
    box-shadow: 0 0 4px 2px #ccc;
}
.ms-left {
    width: 808px;
    height: 708px;
    /* background-color: #ccc; */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
#screen {
    background-color: #000;
    box-shadow: 0 0 4px 2px #ccc;
    border: 4px solid #000;
}
.operations {
    height: 190px;
    width: 808px;
    box-shadow: 0 0 4px 2px #ccc;
    /* background-color: purple; */
}